Antioxidant Effect of Atorvastatin in Type 2 Diabetic Patients

Evidence has long been existed regarding the relationship between oxidative stress and diabetes. The present study was conducted to assess the effect of atorvastatin on selected oxidative stress parameters and its effect on lipid profile parameters in dyslipidaemic type 2 diabetic patients. Fifty nine dyslipidaemic type 2 diabetic patients were included in this study. A full history was taken and general examination was performed. The patients were taking an oral hypoglycaemic drug (glibenclamide) during the study. The patients were followed up for 60 days and divided randomly into 2 groups. Group I (n = 31) received no drug and served as dyslipidaemic diabetic control. Group II (n = 28) received atorvastatin tablets 20 mg once daily at night. Blood samples were drawn from the patients at the beginning and after 60 days of follow up between 8:30 and 10:30 am after at least 12-14 hours fasting. Fasting blood glucose, lipid profile, selective oxidative stress parameters, glutathione S reductase (GSH), malondialdehyde (MDA) levels, glutathione S transferase (GST) and catalase (CAT) activities were measured. Renal and hepatic functions were also assessed. The results showed that atorvastatin treatment produced significant increase in serum levels of GSH and High Density Lipoprotein (HDL), while serum levels of MDA, Total Cholesterol (TC), Triglyceride (TG), Low Density Lipoprotein Cholesterol (LDL-C) and Very Low Density Lipoprotein (VLDL) were significantly decreased. However, no significant effect was observed regarding CAT and GST activity. There were insignificant correlations between atorvastatin induced changes in the oxidation markers and the observed changes of the lipid profile. In conclusion, the antioxidant effect of atorvastatin could be unrelated to its hypolipidemic action as there was insignificant correlation between changes in lipid profile and oxidative stress in this study.

阿托伐他汀对血脂异常兔血清和脂肪组织分泌脂肪细胞型脂肪酸结合蛋白的影响

目的:观察阿托伐他汀短期干预对血脂异常兔血清及脂肪组织分泌脂肪细胞型脂肪酸结合蛋白(AFABP)的影响,并阐明其可能机制。方法:15只新西兰大白兔随机均分为3组:①对照组,给予普通饮食12周;②高胆固醇组,给予高胆固醇饲料12周;③阿托伐他汀组,在饲以高胆固醇饲料8周的基础上给予阿托伐他汀1.5mg·kg-1.d-14周。应用RT-PCR技术测定脂肪组织AFABP mRNA的表达;ELISA法检测血清及脂肪组织培养液中AFABP水平。结果:实验第8周、第12周时高胆固醇组血清总胆固醇、低密度脂蛋白胆固醇水平明显高于对照组(P<0.01);阿托伐他汀组经阿托伐他汀干预后对血脂产生明显影响,并能降低血清及脂肪组织上清液AFABP水平,与高胆固醇组比较,均P<0.05。阿托伐他汀降低血清AFABP水平与降低脂肪组织上清液AFABP水平呈正相关(r=0.943,P<0.05)。RT-PCR结果显示,高胆固醇组脂肪组织AFABP mRNA表达高于对照组(P<0.05);阿托伐他汀组较高胆固醇组能降低兔脂肪组织AFABP mRNA的表达(P<0.05)。结论:阿托伐他汀能降低血脂异常兔血清及脂肪组织上清液AFABP水平,这可能是阿托伐他汀抗动脉粥样硬化的多效性机制之一。

阿托伐他汀对血脂异常的非糖尿病患者血清脂联素和炎症因子的影响

目的探讨血脂异常的非糖尿病患者给予阿托伐他汀治疗后血清脂联素(APN)和炎症因子的变化。方法 20例血脂异常的非糖尿病患者,予阿托伐他汀20mg/d,连服12周;于服药前、服药4周和12周时抽取空腹静脉血,分别测定总胆固醇(TC)、甘油三酯(TG)、低密度脂蛋白胆固醇(LDL-C)、高密度脂蛋白胆固醇(HDL-C)、血清APN、高敏C反应蛋白(hs-CRP)、TNF-α和IL-6。结果与治疗前比较,用药4周后,患者TC、LDL-C、hs-CRP、TNF-α、IL-6明显降低(P<0.01),HDL-C、血清APN明显升高(P<0.01)。继续服药至12周,TC、LDL-C进一步下降至治疗目标值(分别<5.2mmol/L和3.3mmol/L),而炎症因子无明显变化。结论阿托伐他汀治疗可明显降低TC、LDL-C、hs-CRP、TNF-α和IL-6,升高血清APN水平。

氨氯地平-阿托伐他汀复合制剂在心血管疾病治疗中的应用

高血压和血脂异常均为心血管疾病的主要危险因素。氨氧地平是常用的第3代钙通道阻滞药,阿托伐他汀是常用的甲基羟戊二酰辅酶A还原酶抑制剂。氨氯地平-阿托伐他汀复合制剂是2药固定剂量的单一制剂,除降低血压和调脂作用外,氨氯地平和阿托伐他汀联合应用尚有改善血管内皮功能、抗炎症、抗动脉粥样硬化、改善血管顺应性、减少左室肥厚、改善胰岛素敏感性等作用。临床研究表明氨氯地平和阿托伐他汀复合制剂具有疗效显著、依从性好、可降低心血管事件发生、不良反应少而轻微等优点。